So the other day the vet came out to see sparkles due to her foot. Just
to put a long story short she has Ringbone.
Ringbone,
a lameness disease of the pastern and coffin joints, is a degenerative disorder
that has no cure. Fortunately, with treatment and good management, disease
progression can be slowed, allowing the horse to remain competitive.
you can also see more about Ringbone at:
http://www.thehorse.com/articles/14929/what-is-ringbone